Between brackets is the number of accepted species

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- Mollusca (132 791)
- Subphylum Aculifera
- Subphylum Conchifera
- Subphylum Placophora accepted as Polyplacophora
- Superclass Aplacophora
- Class Amphineura accepted as Aculifera
- Class Bivalvia (25 009)
- Class Caudofoveata (143)
- Class Cephalopoda (1 834)
- Class Conchifera accepted as Bivalvia
- Class Cricoconarida † (1)
- Class Gastropoda (102 697)
- Subclass Amphigastropoda † (390)
- Subclass Angiogastropoda represented as Gastropoda
- Subclass Apogastropoda
- Subclass Caenogastropoda (53 636)
- Subclass Gastropoda incertae sedis (308)
- Subclass Heterobranchia (39 156)
- Infraclass "Lower Heterobranchia" (1 137)
- Superfamily Architectonicoidea J. E. Gray, 1850 (262)
- Family Amphitomariidae Bandel, 1994 † (5)
- Family Architectomidae J. E. Gray, 1850 accepted as Architectonicidae J. E. Gray, 1850
- Family Architectonicidae J. E. Gray, 1850 (256)
- Subfamily Philippiinae Melone & Taviani, 1985 accepted as Architectonicidae J. E. Gray, 1850
- Subfamily Philippiinae Boss, 1982
- Subfamily Pseudomalaxinae Garrard, 1978 accepted as Architectonicidae J. E. Gray, 1850
- Genus Acutitectonica T. Habe, 1961 accepted as Discotectonica Marwick, 1931
- Genus Adelphotectonica Bieler, 1987 (5)
- Genus Ammotectonica Harzhauser & Landau, 2023 † (4)
- Genus Architea A. Costa, 1869
- Genus Architectonica Röding, 1798 (40)
- Genus Astronacus Woodring, 1959 accepted as Heliacus (Torinista) Iredale, 1936
- Genus Awarua Mestayer, 1930 accepted as Pseudotorinia Sacco, 1892
- Genus Basisulcata Melone & Taviani, 1985 (1)
- Genus Claraxis Iredale, 1936 accepted as Granosolarium Sacco, 1892
- Genus Climacopoma P. Fischer, 1885 † (3)
- Genus Discosolis Dall, 1892 accepted as Pseudomalaxis P. Fischer, 1885
- Genus Discotectonica Marwick, 1931 (15)
- Genus Disculus Deshayes, 1863 † (1)
- Genus Grandeliacus Iredale, 1957 accepted as Heliacus A. d'Orbigny, 1842
- Genus Granoheliacus Melone & Taviani, 1985 accepted as Solatisonax Iredale, 1931
- Genus Granosolarium Sacco, 1892 (15)
- Genus Gyriscus Tiberi, 1867 accepted as Heliacus (Gyriscus) Tiberi, 1867
- Genus Heliacus A. d'Orbigny, 1842 (55)
- Subgenus Heliacus (Awarua) Mestayer, 1930 accepted as Pseudotorinia Sacco, 1892
- Subgenus Heliacus (Claraxis) Iredale, 1936 accepted as Granosolarium Sacco, 1892
- Subgenus Heliacus (Grandeliacus) Iredale, 1957 represented as Heliacus A. d'Orbigny, 1842
- Subgenus Heliacus (Granoheliacus) Melone & Taviani, 1985 accepted as Solatisonax Iredale, 1931
- Subgenus Heliacus (Gyriscus) Tiberi, 1867 represented as Heliacus A. d'Orbigny, 1842
- Subgenus Heliacus (Heliacus) A. d'Orbigny, 1842 represented as Heliacus A. d'Orbigny, 1842
- Subgenus Heliacus (Mangonuia) Mestayer, 1930 accepted as Pseudomalaxis P. Fischer, 1885
- Subgenus Heliacus (Pyrgoheliacus) Bieler, 1987 represented as Heliacus A. d'Orbigny, 1842
- Subgenus Heliacus (Teretropoma) Rochebrune, 1881 represented as Heliacus A. d'Orbigny, 1842
- Subgenus Heliacus (Torinista) Iredale, 1936 represented as Heliacus A. d'Orbigny, 1842
- Species Heliacus africanus Bartsch, 1915 accepted as Heliacus (Torinista) implexus (Mighels, 1845)
- Species Heliacus albertinae (Sacco, 1892) †
- Species Heliacus alleryi (G. Seguenza, 1876) accepted as Solatisonax alleryi (G. Seguenza, 1876)
- Species Heliacus angularis Makiyama, 1927 †
- Species Heliacus antu S. N. Nielsen & Frassinetti, 2007 †
- Species Heliacus architae (O. G. Costa, 1841) accepted as Pseudotorinia architae (O. G. Costa, 1841)
- Species Heliacus areola (Gmelin, 1791)
- Species Heliacus asper (Hinds, 1844) accepted as Granosolarium asperum (Hinds, 1844)
- Species Heliacus asteleformis (A. W. B. Powell, 1965)
- Species Heliacus aucklandicus P. Marshall, 1918 † accepted as Wangaloa aucklandica (P. Marshall, 1918) †
- Species Heliacus bahamondei Frassinetti & Covacevich, 1981 †
- Species Heliacus berthae (O. Boettger, 1902) †
- Species Heliacus bicanaliculatus (Valenciennes, 1832) accepted as Heliacus (Heliacus) areola bicanaliculatus (Valenciennes, 1832)
- Species Heliacus bisulcatus (A. d'Orbigny, 1842)
- Species Heliacus borealis (A. E. Verrill & S. Smith, 1880) accepted as Solatisonax borealis (A. E. Verrill & S. Smith, 1880)
- Species Heliacus caelatus (Hinds, 1844)
- Species Heliacus canariensis F. Nordsieck, 1982 accepted as Heliacus perrieri (Rochebrune, 1881)
- Species Heliacus cerdaleus (Melvill & Standen, 1903)
- Species Heliacus chiquita Pilsbry & H. N. Lowe, 1932 accepted as Heliacus areola bicanaliculatus (Valenciennes, 1832)
- Species Heliacus chonos S. N. Nielsen & Frassinetti, 2007 †
- Species Heliacus codoceoae Rehder, 1980 accepted as Heliacus (Torinista) implexus (Mighels, 1845)
- Species Heliacus colmani Garrard, 1978 accepted as Pseudotorinia colmani (Garrard, 1978)
- Species Heliacus conicus P. Marshall, 1917 † accepted as Conominolia conica (P. Marshall, 1917) †
- Species Heliacus contextus (G. Seguenza, 1876) accepted as Solatisonax contexta (G. Seguenza, 1876)
- Species Heliacus corallinus Garrard, 1978
- Species Heliacus costatus (Schepman, 1909)
- Species Heliacus crystallina Nowell-Usticke, 1969 accepted as Pseudotorinia crystallina (Nowell-Usticke, 1969)
- Species Heliacus cylindricus (Gmelin, 1791)
- Species Heliacus darraghi Garrard, 1978 †
- Species Heliacus deningeri (K. Martin, 1914) †
- Species Heliacus dilecta (Deshayes, 1863) accepted as Granosolarium asperum (Hinds, 1844)
- Species Heliacus discoideus (Pease, 1868)
- Species Heliacus dorsuosus auct. accepted as Heliacus (Torinista) implexus (Mighels, 1845)
- Species Heliacus elegantissimus Kuroda & Habe, 1961 accepted as Granosolarium elegantissimum (Kuroda & Habe, 1961)
- Species Heliacus enoshimensis (Melvill, 1891)
- Species Heliacus fallaciosus (Tiberi, 1872)
- Species Heliacus fenestratus (Hinds, 1844)
- Species Heliacus geminus Bieler, 1993
- Species Heliacus globosus Harzhauser & Landau, 2023 †
- Species Heliacus hyperionis Bieler, 1993
- Species Heliacus imperfectus Suter, 1917 †
- Species Heliacus implexus (Mighels, 1845)
- Species Heliacus infundibuliformis (Gmelin, 1791)
- Species Heliacus jeffreysianus (Tiberi, 1867)
- Species Heliacus krebsi [sic] accepted as Psilaxis krebsii (Mörch, 1875)
- Species Heliacus lowei Durham, 1950 †
- Species Heliacus madurensis (Schepman, 1909)
- Species Heliacus malani (Dautzenberg, 1910)
- Species Heliacus maorianus A. W. B. Powell, 1934 accepted as Heliacus (Torinista) implexus (Mighels, 1845)
- Species Heliacus mazatlanicus Pilsbry & H. N. Lowe, 1932
- Species Heliacus mighelsi (R. A. Philippi, 1853)
- Species Heliacus miser (Dujardin, 1837) †
- Species Heliacus morningtonensis Garrard, 1978 †
- Species Heliacus nereidis Bieler, 1993
- Species Heliacus numulus Barnard, 1963 accepted as Pseudotorinia numulus (Barnard, 1963)
- Species Heliacus obolos Barnard, 1963 accepted as Pseudomalaxis obolos (Barnard, 1963)
- Species Heliacus oceanitis Bieler, 1993
- Species Heliacus otwayanus Garrard, 1978 †
- Species Heliacus panamensis Bartsch, 1918 accepted as Pseudotorinia panamensis (Bartsch, 1918)
- Species Heliacus perrieri (Rochebrune, 1881) accepted as Heliacus (Teretropoma) infundibuliformis perrieri (Rochebrune, 1881)
- Species Heliacus petasus Tomlin, 1928 accepted as Discotectonica petasus (Tomlin, 1928)
- Species Heliacus planispira Pilsbry & H. N. Lowe, 1932
- Species Heliacus pliohumile Chirli, 2013 † accepted as Solatisonax pliohumilis (Chirli, 2013) †
- Species Heliacus pliohumilis Chirli, 2013 † accepted as Solatisonax pliohumilis (Chirli, 2013) †
- Species Heliacus ponderi Garrard, 1978
- Species Heliacus proteus Bieler, 1993
- Species Heliacus radialis (Dall, 1908) accepted as Solatisonax radialis (Dall, 1908)
- Species Heliacus radiatus (Borson, 1821) †
- Species Heliacus reticulatus Dockery, 1993 †
- Species Heliacus robertsae Durham, 1950 †
- Species Heliacus rotula Kilburn, 1975
- Species Heliacus sigsbeei (Dall, 1889) accepted as Solatisonax sigsbeei (Dall, 1889)
- Species Heliacus smithae Kilburn, 1977 accepted as Pseudomalaxis obolos (Barnard, 1963)
- Species Heliacus stefanmeszarosi Biskupič, 2024 †
- Species Heliacus sterkii (Pilsbry & Vanatta, 1908)
- Species Heliacus stramineus (Gmelin, 1791)
- Species Heliacus subvariegatus (A. d'Orbigny, 1852) accepted as Heliacus fallaciosus (Tiberi, 1872)
- Species Heliacus taverai Frassinetti & Covacevich, 1981 †
- Species Heliacus trochoides (Deshayes, 1830)
- Species Heliacus turritus Bieler, 1987
- Species Heliacus variegatus (Gmelin, 1791)
- Species Heliacus verdensis Bieler, 1984
- Species Heliacus virgatus (Hinds, 1844)
- Species Heliacus wannonensis (Tenison Woods, 1879) †
- Species Heliacus willianseverii D. Tenório, J. Barros, Francisco & G. F. Silva Filho, 2011
- Species Heliacus worsfoldi Quinn, 1981
- Genus Intitectonica Frassinetti & Covacevich, 1982 † (1)
- Genus Mangonuia Mestayer, 1930 accepted as Pseudomalaxis P. Fischer, 1885
- Genus Margaritella Meek & Hayden, 1860 † (1)
- Genus Nipteraxis Cossmann, 1916 † (19)
- Genus Patulaxis Dall, 1892 † accepted as Climacopoma P. Fischer, 1885 †
- Genus Paurodiscus Rehder, 1935 accepted as Spirolaxis Monterosato, 1913
- Genus Philippia Gray, 1847 (3)
- Genus Pseudomalaxis P. Fischer, 1885 (11)
- Genus Pseudotorinia Sacco, 1892 (28)
- Genus Psilaxis Woodring, 1928 (5)
- Genus Redivivus Melone & Taviani, 1985 accepted as Solatisonax Iredale, 1931
- Genus Russetia Garrard, 1961 accepted as Discotectonica Marwick, 1931
- Genus Simplexollata Harzhauser & Landau, 2023 † (7)
- Genus Solariaxis Dall, 1892 accepted as Granosolarium Sacco, 1892
- Genus Solarium Lamarck, 1799 accepted as Architectonica Röding, 1798 (1)
- Genus Solatisonax Iredale, 1931 (24)
- Genus Spirolaxis Monterosato, 1913 (10)
- Genus Stellaxis Dall, 1892 † (4)
- Genus Teretropoma Rochebrune, 1881 accepted as Heliacus (Teretropoma) Rochebrune, 1881
- Genus Torinia J. E. Gray, 1842 accepted as Heliacus A. d'Orbigny, 1842
- Genus Torinista Iredale, 1936 accepted as Heliacus (Torinista) Iredale, 1936
- Genus Tornista [sic] accepted as Torinia J. E. Gray, 1842
- Genus Tornista Iredale, 1936 accepted as Torinista Iredale, 1936
- Genus Verticillus Jousseaume, 1888 accepted as Architectonica Röding, 1798
- Genus Wangaloa H. J. Finlay, 1927 † (3)
- Family Cassianaxidae Bandel, 1996 †
- Family Heliacidae Cotton & Godfrey, 1933 accepted as Architectonicidae J. E. Gray, 1850
- Family Mangonuidae Iredale, 1936 accepted as Mangonuiidae Iredale, 1936
- Family Mangonuiidae Iredale, 1936 accepted as Architectonicidae J. E. Gray, 1850
- Family Mcleaniellidae Pacaud, 2018 † (1)
- Family Solariadae P. P. Carpenter, 1857 accepted as Solariidae P. P. Carpenter, 1857
- Family Solariidae P. P. Carpenter, 1857 accepted as Architectonicidae J. E. Gray, 1850
- Family Teretropomatidae Rochebrune, 1881 accepted as Architectonicidae J. E. Gray, 1850
- Family Teretropomidae Rochebrune, 1881 accepted as Teretropomatidae Rochebrune, 1881
- Family Toriniidae Troschel, 1875 accepted as Architectonicidae J. E. Gray, 1850
- Superfamily Cimoidea Warén, 1993 (114)
- Superfamily Ectobranchia P. Fischer, 1884 accepted as Valvatoidea Gray, 1840
- Superfamily Mathildoidea Dall, 1889 (260)
- Superfamily Omalogyroidea G. O. Sars, 1878 (74)
- Superfamily Orbitestelloidea Iredale, 1917 (64)
- Superfamily Valvatoidea Gray, 1840 (363)
- Infraclass Euthyneura (37 433)
- Infraclass Heterobranchia incertae sedis (478)
- Infraclass Mesoneura (108)
- Infraclass Opisthobranchia
- Infraclass Pulmonata
- Subclass Neomphaliones accepted as Vetigastropoda
- Subclass Neritimorpha (1 914)
- Subclass Orthogastropoda represented as Gastropoda
- Subclass Patellogastropoda (511)
- Subclass Prosobranchia
- Subclass Psilogastropoda represented as Gastropoda
- Subclass Vetigastropoda (6 782)
- Class Lamellibranchiata accepted as Bivalvia
- Class Loricata accepted as Polyplacophora
- Class Mollusca incertae sedis † (372)
- Class Monoplacophora (229)
- Class Pelecypoda accepted as Bivalvia
- Class Polyplacophora (1 377)
- Class Polyplaxiphora accepted as Polyplacophora
- Class Rostroconchia † (64)
- Class Scaphopoda (752)
- Class Solenoconchia accepted as Scaphopoda
- Class Solenogastres (313)
- Subclass Chaetodermomorpha accepted as Caudofoveata